When applying thermoplastic rubber to roof surfaces, a clean and dry condition is required. For best results, do not apply coatings until you are 5 degrees above the dew point.
Field coatings can begin 24-48 hours after seams and fasteners have been prepared with Seam Sealer or when dry to touch. Coatings can be brushed, rolled or sprayed, the best results being sprayed. It is still a good idea to roll the outside edge about 12-18 inches in if possible, to avoid over-spraying sidewalls etc. Wind is a factor, but nowhere near the factor as lighter coatings such as paints etc. Applications should always be done in two coats to avoid pinholing or mudcracking, and to ensure complete and thorough coverage. Follow guide specifications for reliable results, or call Truco personnel to assit in offering a customized specification. Drying time varies with weather conditions. On a warm sunny day, you can usually apply the second coat the next day. The first coat should not be tacky however, so the longer you wait the better.
When coating a roof that has been previously coated with aluminum or asphalt, there may be a bleed thru on the first coat of Truco’s liquid rubber coatings. Allow 2 weeks between first and second coat and put a test patch on to check for bleed thru before applying second coat.